Broom sewing apparatus



J 1949 R. E. GROOME 2,186,372:

BROOM SEWING APPARATUS Filed Oct. 22, 1938' 3 Sheets-Sheet l InmcntouROBERT E. GRooME dttorncg Jan. 9, 1940. R. E. GROOME- 2,186,378

' BROOM SEWING APPARATUS- Filed Oc't. 22, 1938 s Sheets-Sheet 231mentor;

ROBERT E. GROOME Gttorncg .Fan. 9, 1940. R. E. GROOME BROOM SEWING Arr'AA-Tus 3 Sheets-Sheet Filed Oct. 22, 1938 attorney Patented Jan. 9, 1940BROOM SEWING APPARATUS Robert E. Groome, near Greensboro,l \T. fApplication October 22, 1938, Serial No 236,535" 7 v 4 Claims; (01. na-sit This invention relates to a selfstarter m'ech- :anism .for a broo-msewing machine and more expecially to a mechanism capable ofrotating.the vise which grips the broom from normal position to sewing position.

In the conventional broomsewing machine a I vise is employed forgripping a. bunch of broom corn or other broom material. while thismaterial is being stitched together by a suitable cord. Be-

fore cord is placed in the broom by the stitching mechanism, it isnecessary to lift or to-rotate the vise containing the broom, fromnormal po- 7 sition to stitchingposition, after which the vise and thebroom will be returned byconventional driving mechanism' to normalposition as the, b-room is being sewed, a portion ofthe conventionaldriving mechanism for moving the broom holder to normal position.Heretofore, it'has been a practice fortheoperator to vmanually lift thevise fromnorrnal position to sewing posi-.

tion. Since the normal production of brooms is very high in mechanismfor this type the operator will have to lift this vise many timesduringtheday. I p '1.

It is therefore an object of this; invention to provide a power drivenstarting means for a broom sewing machine of the class described,comprising a driven pulleyon. the broom sewing machine which isadapte-dto be contacted at the desired time by an eccentric which,inturn, will-be rotated tocause the vise containing the broom to movefrom normal position to sewing position.

It is another object of this invention to pro.

:vide a broom starting mechanism of this type which is easy to install,simple in. construction,

hand side of Figure 2 showing the vise which economical to manufactureand easy'to operate.

Some of the objects of the invention having been stated other objectswillappear as the description proceeds when taken in connection with theaccompanying drawings, in'which:

Figure 1 is an isometric view showing my: invention .in bold lines andshowing the conventional parts indotted lines;

Figure 2 is an elevation of a portion of a broom sewing machine showinga portion of my invention applied thereto;

Figure 3 is a view similar to FigureZ ing the parts in a slightlydifferent position;

Figure 4 is an. elevation, looking atthe left holds the broom both-inbold lineand dotted line positions;

Figure 5 is an elevation looking at hand side of Figure 2.

the right is no covering. Secured around the shaft 26 and adjacent thepulley -25 (Figure 4) is a grooved but show- Referring more specificallyto the drawings, the numeral ill denotes the framework of a. broomsewing machine in which is rotatably mounted a ,shaft l i this shafthaving a pulley Mi thereon and also a cam drum E2. The pulley is drivenby a suitable belt l5 from a source Vise ll occupies the position shownin bold lines" when in normal position in Figure; 4, but when itisdesired' tosew the row of stitches 28-, it is swung to dotted lineposition, after which the visewill return to bold line position byvirtue of conventional driving mechanism. It is dur- 1 ing this returnthatthe row of stitches 26 are placed in the broom i3. Since the vise i!is very heavy it is evident that much energy is required to push thesame from bold line position to dotted line position. This is especiallytrue .in

View of the fact that thousands of rows of stitches are sewed during aday, and each time-a rowr is sewedit is necessary to move thevise-I'rom.

bold line position to dotted lineposition.

.1 have therefore provided power jdr-iven mechanism for moving the vise,and the broom fromnormalposition to sewing position. This device isshown in'bold lines in Figure 1 and cornmounted as at '28 on frame 2?,said frame having its lower end pivoted as at 28a to the broom machineframework It.

The wheel Zi'ihas a friotion covering 28- secured to a position of theperiphery thereof" This covering is preferably made of rubber andpartially surrounds thewheel 25', thereby leaving a lows-pace 29 inwhich there.

pulley ea This pulley'has securedthereto, one end of aoab'le 35 as at32, this cable extending upwardly over a sheave pulley 33 which, inturn, f. is sup-ported by an eye bolt 3d. The bolt 34 has: its upper endadjustably mounted-in one end of bracket 35, said bracket being securedto the upper side of framework i5 by any suitable means such as studbolts as. The eye bolt 34 isgconfined in the end ofbracket 35 by anysuitable means such as nuts 3?. The other end of cable 31 -is-' securedtoa hook 38, and the hook is secured inz shapedplate member 39. Theplate member 7 is slidably mounted around a shaft 4b which, in-

turn, is secured in-the upper portion of the vise.

- prises an eccentric wheel 25 which is rotatably' operators foot.

clockwise manner.

. a lock nut Bil therearound.

11. Also disposed around shaft 46 is a compression spring 4!.

When the vise H is in normal or bold line position as shown in Figure 4the frame 27 and its associated pulley I5 is in the position shown inFigure 2. At this time it is seen cover 28 of the pulley does not engagethe belt I 5 which is rotating on pulley M. The frame 21, however, isheld in this position by means of suitable tension springs 42. When itis desired to rotate the vise to sewing position it is necessary torotate the frame 21 until the cover 28 on the periphery of pulley 25engages thebelt it. When this is done the pulleys 25 and will be rotatedby this belt until thelow space 29 is reached. During this rotation ofthe wheel 25 the cable is wound around the pulley '35 in the mannershown in Figure 3 to cause the vise H to be drawn to dotted lineposition in Figure l. The broom is now ready for a sewing operation bysuitable oscillating needles, not shown, which move through the loopingeyes 55 and Ethand thus a line of stitches "will be formed in the broomwhile it is moving to bold line position in Figures 4 and 5.

In order to provide an easy means for bringing the lining 28 intocontact with the belt i5 I have constructed a mechanism whereby a handor foot of the operator can be brought into play'for accomplishing thisresult. This mechanism comprises an eye bolt 44 which is secured in theupper end of frame 21, said eye bolt having secured to one end thereof acable 45 which passes over pulley 4B and has its other end connected toaneye bolt 61, said eye bolt t? being secured to the upper portion of alever 48 as at 49. The lever 48 is pivoted intermediate its. ends as at5D to a bracket 5|. It will be noted that the upper end of this leverhasa handle 52 which may be engaged by the operators hand and also has apedal 55 which may be engaged by the Bracket 5i is secured to theframework Ill by means of bolts 56. This bracket has a set screw 51therein, the end of which is adapted to contact the lever 48 at a pointabove pivot'50 when the parts are in normal position.

In other words, the end of set screw 5! acts as a stop to prevent thelever 48 from swinging too far. in a counterclockwise manner in Figure5. A suitable lock nut 58 is also secured around set screw 5'! to lockthe set screw in an adjusted position. A similar set screw 59 isprovided below the pivot point and the end of this set screw is adaptedto be contacted by the lower portion of the lever 48 when the operatorplaces his foot on the treadle or when the handle 54 is operatedmanually to rotate the lever 48 in a Likewise this set screw has When itis desired to place the machine in operation, that is, to move the viseI I and the broom [8 to sewing position as shown in dotted lines inFigure 4, the operator places his foot upon the pedal 55 (Figure 5),which rotates the lever 48 in a clockwise manner. This rotation willplace tension upon the cable l5 and thereby draw the wheel 25-intocontact with the rotating belt [5 in Figure 2. Since the high side orthe cover 28 of wheel 25 will contact the belt l5 it is evident thatrotation will be imparted to the wheel 25 to cause the cable 3! to bewound around the pulley 3B in the manner shown in Figure 3, at whichtime the vise M will be drawn to sewing position as shown in dottedlines in Figure 4. After the wheel 25 has been rotated far enough tocause the highside of the wheel to move off of the belt I5 the lowperiphery 29 will not contact the belt; consequently the movement of thevise will automatically stop at this time. Then upon the release ofpressure upon the treadle 55 by the operator the wheel 25 will return tonormal position as shown in Figure 2 by virtue of conventional drivingmechanism and the expansion of spring 4!. Likewise, the frame 21 willalso return to the normal position as shown in Figure 2 by virtue oftension spring 42.

It is very important that the set screw 59 be positioned so that whenthe lower portion of lever 55 strikes the end of the same that the wheel25 will be moved enough to cause only the lining 23 to contact the belt[5. It is not drawn close enough for the low periphery 29 to contact thebelt l5; consequently it is only while the lining 28 contacts the beltl5 that the vise I! is drawn to sewing position. Figure 3 shows theposition of wheel 25 after it has completed its rotation, but prior toits return to normal position.

The function of the spring 4| (Figures 1 and 4) is to act as a shockabsorber. When the wheel 25 is first drawn into contact with belt 15,very often a sudden jerk will be imparted to this wheel to cause thecable to rotate the vise II. By pro viding this spring, thesudden jerkis absorbed and the vise I l is gradually drawn to sewing position.

It is seen from the drawings that adjustment of the initial position ofthe vise I! can be made by merely tightening or loosening the lock nuts31 which support the sheave pulley 33. Likewise the initial position ofthe frame 21 which carries 7 the pulley 25 can be adjusted bymanipulating the lock nuts on eye bolts M and 41.

In the drawings and specification there has been set forth a preferredembodiment of the invention, and although specific terms are employed,they are used in a generic and descriptive sense, only, and not forpurposes of limitation, the scope of the invention being set forth inthe appended claims.

I claim:

1. In a broom sewing machine having a vise for holding the broom duringa sewing operation, said vise being pivoted intermediate its ends andhaving broom holding means in its upper end, a power driven shaft havinga pulley with a belt thereon, a pivoted frame having a wheel rotatablymounted therein, friction means covering less than the whole peripheryof the wheel, means for moving the wheel into contact with the belt onsaid pulley, a grooved pulley secured on one side of the wheel andhaving a cable secured? ley to move the vise from normal to sewing po-"sition.

2. In a broom sewing machine having a vise for holding a broom and beingmounted for movement past the sewing point in the machine,

a driven pulley in the machine, a driving belt on the pulley, a framehaving a wheel mounted therein, friction means covering less than thewhole periphery of the wheel, manually or pedally operated means formoving the wheel into contact with the belt, and a cable connectionbe-'- tween the wheel and the vise for moving the vise past the sewingpoint of the machine while the friction portion of the wheel is incontact with the belt.

3. In a broom sewing machine having a vise pivoted. intermediate itsends and constructed to occupy a normal position remote from the sewingpoint of themachine; a pulley in said machine having a driving beltthereon, said vice having material past thesewing point of the machineprior to at sewing operation, said means comprising a pivoted frame, awheel in said frame, friction means covering less than the wholecircumference of the wheel, a winding pulley and cable associatedwithsaid wheel and connected to'said I 'vise, means for moving the wheelinto contact with the belt a while the belt turns 'the Wheel through aportion of a revolution to wind the sewing point of the machine. i n

cable on the pulley to movethe vise past the '4. In a broom sewingmachine havingaframe,

a pulley mounted for rotation in the frameand having va driving beltthereon, a pivoted frame associated with the pulley and belt and havinga wheel and winding drum mounted for rotation thereon, said wheel havinga friction surface over a portion of its periphery and having a lowplace disposed between the borders of said friction sur- 3 face, a'broomholding vise 'swingable past the sewing point of the machine,a cableconnected to said drum and to said vise, means for moving, thepivotedframe to cause the'friction surface to contact the belt to impartrotation to the Wheel and drum and to thereby move the vise and itsbroom past the sewing point of the machine while the needles are idle.

ROBERT GROOME;

